Polyaniline-epoxy resin corrosion-resistance composite passive film

Abstract

The invention discloses a polyaniline-epoxy resin corrosion-resistance composite passive film. The composite passive film is prepared from dodecafluoroheptyl methacrylate, hexafluorobutyl methacrylate, silane coupling agent KH560, azodiisobutyronitrile, silane coupling agent KH570, a proper amount of silane coupling agent KH580, silane coupling agent KH550, trifluoromethyl trimethylsilane, lauryl sodium sulfate, carbon nanotube, aniline, ammonium persulfate, sodium molybdate, phosphoric acid, hydrogen peroxide, silica sol, epoxy resin, curing agent, a proper amount of anhydrous ethanol, a proper amount of tetrahydrofuran, a proper amount of dilute nitric acid and a proper amount of de-ionized water. The prepared passivating solution is simple in preparation method, low in cost, free of poison and environmentally friendly; the provided passivation method can largely shorten the treatment time, and omits the oiling process; and the formed passive film is excellent in wear resistance, corrosion resistance, heat resistance and fingerprint resistance, relieves corrosion of a zinc coat, and is excellent in application prospect.

Description

technical field [0001] The invention relates to the technical field of chrome-free passivation, in particular to a polyaniline-epoxy resin corrosion-resistant composite passivation film. Background technique [0002] Galvanized wide-band steel plate refers to a steel plate coated with a layer of zinc on the surface. Galvanizing is to prevent corrosion on the surface of the steel plate and prolong the service life of the steel plate. Galvanized wide-band steel plate is becoming more and more closely related to people’s lives. Use color-coated panels and car benches. Because zinc is very active, it is easily corroded by acids, alkalis, oxygen, carbon dioxide and water vapor in the atmosphere, so it needs to be passivated. The traditional passivation method of galvanized sheet generally adopts passivation containing chromate. This method has the advantages of excellent film-forming performance, low cost and simple process, but the chromium ions contained in the chromate are ca...

AI Technical Summary

Problems solved by technology

The chromium-free passivation solution provided by the author can fundamentally solve the problem of toxic and harmful chromium ions poisoning people in the existing passivation solution, and can also truly replace the chromium-containing passivation solution to realize the conversion of electro-galvanized wide-band steel sheets. However, the plating film formed by this chromium-free passivation solution still cannot meet the market demand in terms of low friction, anti-oxidation, corrosion resistance, self-lubrication, wear resistance, etc., and further modification is needed to improve the application field and expand the application prospect